Method for imparting a linenlike effect to cotton



Patented Nov." 6, 192s.

UNITED STATES PATENT oFF cE. 7

nommnrcn EGLL-OF Anson, SWITZERLAND, AssIeNon'mo ex'rinnensnmscnem snnnmnor mom, SWITZERLAND, A COBPQRATIONDF SWITZERLAND.

METHOD FOR mran'rme A LINENLIKE nrrnc'r rro co'r'ron.

1'0 Drawing.

Experiments for producing linen-like effects on cotton are not novel; many years ago attempts were made to obtain these effects bysubjecting cotton fabric to a prolonged mercerizationand to increase these effects by utilizing yarns having a higher ,degree of twist than such used for ordinary fabrics. The mercerizin foulards of Zittau were particularly 's'uita le, for producing these effects and they wereparticularly in favor for manufacturing shirtings. I

Recently attempts have been made to fur.- ther improve these effects. The means proposed to this end comprise in one case a cold mercerization, i. e. a mercerization at a temperature of below 0 (1,. and-in another 'case an alternate cold mercerization and an acid treatment with sulfuric acid of above 50 Be, whereby cotton may bemercerized first and parchmentized thereafter or vice versa.

The subject matter of the present invention is a method for imparting a linen efiect .tocotton which is characterized by the fact that yarns or fabrics the numbering of which does not exceed count 60 are subjectedto the action of sulfuric acid of from 49-50 B. for a shorter or longer period depending on the count of the yarn, and are then well washed and mercerized under tension with'a caustic soda solution of above 15 B. at a temperature of above 0 C. The invention is thus based on the observation that this method applied to coarse yarns and fabrics does not produce wool-like effects but linen-like efi'ects.

, It is a surprising result that yarns or fabrics treated with sulfuric acid of less than B. and j subs uently treated under tension with caustic a ali of above 15 B.

- at a temperature of above 0- C. show a linen It is known to use sulfuric like apglearance.

acidb less than 50% B. inorder to obtain effects which are softerthan ordinary cotton, that is to say for effects which have a wool-like softness. The linen-like effectobtained with coarse yarns is almost .the'con- -trary of what could be expected. In order tb carry out the present method ordinarily yarns of a coarseness below- No. Englis fineness does not exceed English Application 'filed January 2, 1926. Serial No. 79,032.

count are utilized. Preferably the yarns or fabrics are treated with sulfuric acid of.

from 4950 Be. at a temperature ofifrom O-5 C. for a longer or shorter period, (4

minutes and more) according to the thick are well washed. The yarns and fabric have now completely-thecharacter of linen and neither a repeated boiling nor washing'rwill impair the strength or the gloss of the product. In orderto complete. the linen-like character the products are ordinarily mechanically manipulated such'as by calender- .ing same such as is customary with linen. 1

Having now particularly described and ascertained the nature, of my said invention and in what manner the same is to be performed, I declare that what I claim is: i

'1. Process for producing permanent linenlike effects in cotton goods, which comprises taking for treatment cotton goods (yarns and webs) constituted of threads whose arn-No.

60, and subjectin such goods-to t e action of sulphuric aci R of from about 49 to 50 B. fora period of not less than about four minutes, then washing the goods and vthereafter subjecting the same while under tension to a treatment with caustic alkaliof about 15 B. at ordinary temperatures. a

2. Process for producing permanent linenlike effects in cotton goods, which comprises takingv for treatment cotton goods (yarns and webs) constituted of threads whose fineness does not exceed English am No...

60," and subjecting such goods to t emotionof sulphuric acid of from about 499,.to501/ f" B. at a temperature of from about-03110 5'? 0., then washing the goodaandthe reafter 3.- Process for producing'permanent linen-- subjecting the same while under' -;.tension to like effects in cotton goods, which com rises taking for-treatment cotton yarns and webs) constituted ofthreadfi i ness does not exceed English yarn No. 60, sion to e treatment with caustic alkali of and subjectin such goods to the action of above 15 B. atordinary temperatures.

sulphuric aci of from about 49 to 5O Dated this 16th day of December, 1925. 10"

B. at a tempemtui'e of from about 0 to 5 In testimony whereof I have signed my C. fOr'Q, period of not less than about. four name to this specification.

minutes, then washing the goods and thereafter subjecting the same while under teri- HULDREIC HNEGLI. 

